Help 3D scanner arduino android

[JanVenken]

Is there any way to send a bluetooth signal from arduino to a smartphone camera?

We're building a 3D scanner using a smartphone. The arduino controls a rotating disc that's driven by a servo. Every 24 ° the servo stops and a signal should be send from the arduino bluetooth module JY-MCU to the smartphone so it takes a picture.
The programming of the servo is easy but I can't seem to find how to get the bluetooth module to operate the smartphone's camera.

 

[scary alien]

Welcome to our AndroidForums, @JanVenken.

Not sure that a device's stock camera would/can be operated simply via a blue tooth connection--don't think it works that way--i.e., it (the camera app) operates via the touch input from the device's digitizer and not via blue tooth.

You'd likely have to find an app on the Play Store that does this (it looks like there be some that do) or write your own to interact with the Android camera/photo APIs.

Cheers!

P.S. not sure what your attached image (desktop screenshot) has to do with your question?

 

[JanVenken]

Hallo

Thanks for the answer! The screenshot was a lapsus My collegue has a bluetooth remote that operates the camera on the smartphone (the standard android app) so there must be some way to send a bluetooth signal that focusses the camera and then takes a picture. This should be the "enter" command of a bluetooth keyboard...

 

[JanVenken]

Okay, I managed to link up the bluetooth module to the smartphone. All i need to know now is this: how does a simple bluetooth shutter/release button work? I mean, what signal/characterset does it transmit to the android device so it knows it should focus and take a picture.

 

[JanVenken]

A bluetooth shutter is in fact, so I've learned, a small bluetooth keyboard with just one button; the enter button (for android). So, how is the enter command (CR) transmitted to an android device?

 

[JanVenken]

Ok, found it...